RepRapDiscount LCD Issue

Ok, everything was working fine. Then a "PRINTER HALTED" Temp issue (i've fixed this one before so, shouldn't be a problem) and when I restarted the printer, the LCD was blank, like this.

[i.imgur.com]

Plugged the arduino to the PC and runed pronterface; it detects the SD on the LCD, prints from it and everithing works fine. Also, the extruder stepper won't move during printing. The stepper works fine (checked it with the X axis), but it won't receive signals during printing.

Any ideas?

I would suspect you have damaged the main controller cpu. Several I/O pins no longer work as they should.

But first re upload your firmware, sometimes a fault like this just needs a firmware reflash.

I've done that and the issue persists :s .

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Temp issue (i've fixed this one before so, shouldn't be a problem)

That made me smile because, if you had fixed it it wouldn't have happened again
IMHO you grilled your controller with a shortcut caused by the same issue that was causing the TEMP issue.
Be careful with electronics, people have lost their homes by "fixing" things....

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o_lampe

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Temp issue (i've fixed this one before so, shouldn't be a problem)

That made me smile because, if you had fixed it it wouldn't have happened again
IMHO you grilled your controller with a shortcut caused by the same issue that was causing the TEMP issue.
Be careful with electronics, people have lost their homes by "fixing" things....

Yeah, the first temp issue was because of the heatbed thermistor wasn't reading well. Now I thought could be something like that on the hotend thermistor, but when I was about to look it, this happened.

Anyways, I thought when the controller were grilled it wouldn't work; not that it could be partially burned

You have probably done this already but have you reseated the extruder driver, the extruder plug to your board and the extruder thermistor plug to the board.
This happened to me and my board and drivers were fine, after days of reading forum posts I just unplugged everything and plugged it all back in and no more problem........ yet